Abstract: According to one embodiment, a damaged region determination system of the embodiment includes a plurality of sensors, a position locator, and a determiner. The plurality of sensors detects elastic waves generated in a target object related to a railway which is a determination target of a damaged region. The position locator locates positions of sources of a plurality of elastic waves based on the plurality of elastic waves detected by each of the plurality of sensors. The determiner determines the damaged region in the target object based on the positions of the sources of the plurality of elastic waves.

Abstract: In a state estimation method of an embodiment, from time series data representing a time change of a main physical quantity concerning an estimation target, a local maximum and minimum values of the main physical quantity, and an inter-extreme-value time from an extreme value to the next extreme value are extracted. In the state estimation method, a state change speed of the estimation target is calculated based on relationship data representing the relationship of the state change speed with the local maximum and minimum values and the extracted local maximum and minimum values. In the state estimation method, a state change amount of the estimation target is calculated for each inter-extreme-value time based on the extracted inter-extreme-value time and the calculated state change speed.

Abstract: According to one embodiment, a power control circuit includes a converter, a signal generating circuit, an estimation unit, and a controller. The converter includes a switching circuit and is configured to transform an output voltage from a power generator. The signal generating circuit is configured to transmit a signal to the switching circuit. The estimation unit is configured to determine a switching operation condition based on vibration information indicative of a vibration applied to the power generator. The controller is configured to control an operation of the switching circuit based on the determined switching operation condition.

Abstract: A condition monitoring system includes a power generator and a condition monitoring apparatus. The condition monitoring apparatus includes, voltage measuring circuit which measures a voltage value of power generated by the power generator, a data memory which stores a past voltage value measured by the voltage measuring circuit, a calculation circuit which calculates a difference between a current voltage value measured by the voltage measuring circuit and at least one past voltage value stored in the data memory, and a controller which determines an issue period indicating a period of time until a trigger signal is issued based on the difference calculated by the calculation circuit, and issues the trigger signal to the condition monitoring apparatus based on the issue period.

Abstract: According to one embodiment, a control apparatus for controlling a sensor that operates on power supplied by a power generator via an electric circuit including a rectifying and smoothing circuit converting AC power output from the power generator into DC power and a converter transforming an output voltage of the rectifying and smoothing circuit includes a first and a second signal generator and a controller. The first signal generator generates a first signal based on the output voltage of the rectifying and smoothing circuit. The second signal generator generates a second signal based on an output voltage of the converter. The controller switches an operation mode of the sensor between a sleep mode and an active mode based on the first and second signals.

Abstract: According to one embodiment, a damaged region determination system of the embodiment includes a plurality of sensors, a position locator, and a determiner. The plurality of sensors detects elastic waves generated in a target object related to a railway which is a determination target of a damaged region. The position locator locates positions of sources of a plurality of elastic waves based on the plurality of elastic waves detected by each of the plurality of sensors. The determiner determines the damaged region in the target object based on the positions of the sources of the plurality of elastic waves.

Abstract: According to one embodiment, an inspection system of an embodiment is an inspection system for inspecting a bogie including a plurality of side beams extending in a front-rear direction and disposed apart from each other in a left-right direction and a cross beam connecting the plurality of side beams. The inspection system includes one or more sensors and a position locator. The one or more sensors are installed on at least one of the plurality of side beams and the cross beam and detect elastic waves. The position locator identifies a beam in which the elastic waves have been generated or locates a position of an elastic wave source on the basis of the elastic waves detected by the one or more sensors.

Abstract: According to an embodiment, a particle beam treatment system includes a storage, an estimator, a target value generator, and a particle beam treatment device. The storage stores therein a respiratory movement model obtained by synchronizing amount of displacement of an affected area of a subject with a signal related to respiration of the subject and performing modeling. The estimator estimates, based on the measured signal related to respiration and the respiratory movement model, amount of displacement of the affected area corresponding to the measured signal. The target value generator generates a target value, which is used for performing movement control on a platform on which the subject is lying down, corresponding to the estimated amount of displacement of the affected area. The particle beam treatment device irradiates, with particle beams, the affected area of the subject on the platform subjected to movement control according to the target value.

Abstract: A power control circuit includes a converter, a signal generation circuit, and control circuitry. The converter includes a switching circuit. The converter transforms an output voltage from a power generator. The signal generation circuit operates the switching circuit of the converter. The control circuitry changes an operation of the switching circuit.

Abstract: According to one embodiment, a control apparatus for controlling a sensor that operates on power supplied by a power generator via an electric circuit including a rectifying and smoothing circuit converting AC power output from the power generator into DC power and a converter transforming an output voltage of the rectifying and smoothing circuit includes a first and a second signal generator and a controller. The first signal generator generates a first signal based on the output voltage of the rectifying and smoothing circuit. The second signal generator generates a second signal based on an output voltage of the converter. The controller switches an operation mode of the sensor between a sleep mode and an active mode based on the first and second signals.

Abstract: According to one embodiment, a vibration generator includes first and second integrated elastic support bodies, a vibrator, and a coil. Each of the first and second integrated elastic support bodies includes an elastic beam part configured to undergo elastic deformation, and a support part supporting the elastic beam part, the elastic beam part and support part being integrally formed. The vibrator includes a magnet and a magnetic material, and is interposed between the first and second integrated elastic support bodies and supported so as to vibrate. The coil is located inside the vibrator, and interposed and supported between the first integrated elastic support body and the second integrated elastic support body.

Abstract: A condition monitoring system includes a power generator and a condition monitoring apparatus. The condition monitoring apparatus includes, voltage measuring circuit which measures a voltage value of power generated by the power generator, a data memory which stores a past voltage value measured by the voltage measuring circuit, a calculation circuit which calculates a difference between a current voltage value measured by the voltage measuring circuit and at least one past voltage value stored in the data memory, and a controller which determines an issue period indicating a period of time until a trigger signal is issued based on the difference calculated by the calculation circuit, and issues the trigger signal to the condition monitoring apparatus based on the issue period.

Abstract: According to one embodiment, a power control circuit includes a converter, a signal generating circuit, an estimation unit, and a controller. The converter includes a switching circuit and is configured to transform an output voltage from a power generator. The signal generating circuit is configured to transmit a signal to the switching circuit. The estimation unit is configured to determine a switching operation condition based on vibration information indicative of a vibration applied to the power generator. The controller is configured to control an operation of the switching circuit based on the determined switching operation condition.

Abstract: According to one embodiment, a vibration power generator includes a housing, an elastic member, a mover, and a coil. The elastic member is fixed to the housing. The mover is supported by the elastic member and able to vibrate in a first direction. The coil is positioned inside the mover. The mover includes a first magnet, a second magnet, a third magnet, and a first magnetic yoke. The second magnet is placed to be aligned with the first magnet in the first direction so as to repel each other. The third magnet is placed annularly with respect to the first magnet and the second magnet. The first magnetic yoke surrounds the first magnet, the second magnet and the third magnet. The coil is positioned between the third magnet, and both the first magnet and the second magnet.

Abstract: According to one embodiment, a power generation system includes a power generator, a displacement measuring part, and a converter. The power generator includes a movable part and converts mechanical energy of the movable part into electric power. The displacement measuring part measures a displacement of the movable part. The converter includes a switching circuit whose duty ratio is controlled based on the measured displacement, and converts a voltage level of the electric power.

Abstract: A power control circuit includes a converter, a signal generation circuit, and control circuitry. The converter includes a switching circuit. The converter transforms an output voltage from a power generator. The signal generation circuit operates the switching circuit of the converter. The control circuitry changes an operation of the switching circuit.

Abstract: A power generation system in an embodiment includes a power generator, a rectifying and smoothing circuit, a converter, a voltage measurement unit, and a switch. The power generator outputs AC power. The rectifying and smoothing circuit converts the AC power to DC power and smooths the DC power. The voltage measurement unit measures an average voltage of the AC power or a voltage of the smoothed DC power. The converter transforms the smoothed DC power. The switch is disposed between the rectifying and smoothing circuit and the converter, and becomes an ON state when the measured voltage becomes a reference voltage or higher.

Abstract: According to an embodiment, a particle beam treatment system includes a storage, an estimator, a target value generator, and a particle beam treatment device. The storage stores therein a respiratory movement model obtained by synchronizing amount of displacement of an affected area of a subject with a signal related to respiration of the subject and performing modeling. The estimator estimates, based on the measured signal related to respiration and the respiratory movement model, amount of displacement of the affected area corresponding to the measured signal. The target value generator generates a target value, which is used for performing movement control on a platform on which the subject is lying down, corresponding to the estimated amount of displacement of the affected area. The particle beam treatment device irradiates, with particle beams, the affected area of the subject on the platform subjected to movement control according to the target value.

Abstract: According to an embodiment, a particle beam treatment system includes a storage, an estimator, a target value generator, and a particle beam treatment device. The storage stores therein a respiratory movement model obtained by synchronizing amount of displacement of an affected area of a subject with a signal related to respiration of the subject and performing modeling. The estimator estimates, based on the measured signal related to respiration and the respiratory movement model, amount of displacement of the affected area corresponding to the measured signal. The target value generator generates a target value, which is used for performing movement control on a platform on which the subject is lying down, corresponding to the estimated amount of displacement of the affected area. The particle beam treatment device irradiates, with particle beams, the affected area of the subject on the platform subjected to movement control according to the target value.

Abstract: According to one embodiment, a power generation system includes a power generator, a displacement measuring part, and a converter. The power generator includes a movable part and converts mechanical energy of the movable part into electric power. The displacement measuring part measures a displacement of the movable part. The converter includes a switching circuit whose duty ratio is controlled based on the measured displacement, and converts a voltage level of the electric power.